EDP Sciences
Free access
Volume 401, Number 2, April II 2003
Page(s) 463 - 470
Section Extragalactic astronomy
DOI http://dx.doi.org/10.1051/0004-6361:20030129

A&A 401, 463-470 (2003)
DOI: 10.1051/0004-6361:20030129

Shakhbazian compact galaxy groups

II. Photometric and spectroscopic study of ShCG 376
H. M. Tovmassian1, H. Tiersch2, V. H. Chavushyan1 and G. H. Tovmassian3

1  Instituto Nacional de Astrofísica Óptica y Electrónica, AP 51 y 216, 72000 Puebla, Pue, México
    e-mail: vahram@inaoep.mx
2  Sternwarte Königsleiten, 81477 München, Leimbachstr. 1a, Germany
    e-mail: htiersch@uni.de
3  Observatorio Astronomico Nacional, Instituto de Astronomia, UNAM, 22860 Ensenada, BC, México
    e-mail: gag@astrosen.unam.mx

(Received 5 July 2002 / Accepted 13 December 2002 )

The results of the redshift measurements and of the detailed surface photometry in BVR of the compact group ShCG 376 are presented. The radial velocity dispersion, the virial mass, the total luminosity, the ${\cal M}/L$ ratio, and the crossing time of the group are estimated. The group consists of eight accordant redshift spiral galaxies. Four (or possibly five) of the group members have emission-line spectra. Such morphological content and the number of emission-line galaxies are very atypical for compact galaxy groups. There are signs of interaction between some members of the group. It is suggested that the irregular shape of the brightest galaxy No. 4 is probably due to interaction with other members of the group, particularly, the emission line galaxy No. 6 with a discordant redshift ( $\Delta v = 2600$ km s -1). It is speculated that the latter galaxy may be a infalling intruder to the group.

Key words: galaxies: clusters: general -- galaxies: interactions -- galaxies: kinematics and dynamics -- galaxies: photometry

Offprint request: H. M. Tovmassian, hrant@inaoep.mx

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© ESO 2003